diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_lrc.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 11 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 16a023ac4604f..13941d1c0a4a7 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1622,6 +1622,7 @@ static bool can_merge_rq(const struct i915_request *prev, if (!can_merge_ctx(prev->context, next->context)) return false; + GEM_BUG_ON(i915_seqno_passed(prev->fence.seqno, next->fence.seqno)); return true; } @@ -2142,6 +2143,9 @@ static void execlists_dequeue(struct intel_engine_cs *engine) GEM_BUG_ON(last && !can_merge_ctx(last->context, rq->context)); + GEM_BUG_ON(last && + i915_seqno_passed(last->fence.seqno, + rq->fence.seqno)); submit = true; last = rq; diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index ca5361eb1f0b0..66efd16c48506 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -737,6 +737,7 @@ __i915_request_create(struct intel_context *ce, gfp_t gfp) RCU_INIT_POINTER(rq->timeline, tl); RCU_INIT_POINTER(rq->hwsp_cacheline, tl->hwsp_cacheline); rq->hwsp_seqno = tl->hwsp_seqno; + GEM_BUG_ON(i915_request_completed(rq)); rq->rcustate = get_state_synchronize_rcu(); /* acts as smp_mb() */ @@ -1284,6 +1285,16 @@ __i915_request_add_to_timeline(struct i915_request *rq) prev = to_request(__i915_active_fence_set(&timeline->last_request, &rq->fence)); if (prev && !i915_request_completed(prev)) { + /* + * The requests are supposed to be kept in order. However, + * we need to be wary in case the timeline->last_request + * is used as a barrier for external modification to this + * context. + */ + GEM_BUG_ON(prev->context == rq->context && + i915_seqno_passed(prev->fence.seqno, + rq->fence.seqno)); + if (is_power_of_2(prev->engine->mask | rq->engine->mask)) i915_sw_fence_await_sw_fence(&rq->submit, &prev->submit, |